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FreeBSD 5.3
FreeBSD 5.3 Open Issues
Open Issues
This is a list of open issues that need to be resolved for FreeBSD 5.3. If
you have any updates for this list, please e-mail re at FreeBSD.org.
Show stopper defects for 5.3-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|--------------------+-----------+-------------+-------------------------|
| | | |PREEMPTION appears to |
| | | |increase the chances of |
| | | |triggering a race |
| | | |condition in the thread |
|PREEMPTION-related | |Scott Long, |context management and |
|hangs involving |In progress|Julian |scheduling code. Patches |
|threads | |Elischer |to mitigate the problem |
| | | |have been developed, with|
| | | |on-going work to come up |
| | | |with the correct solution|
| | | |prior to 5.3. |
|--------------------+-----------+-------------+-------------------------|
| | | |Jun Kuriyama has reported|
| | | |problems with NFS over |
| | | |IPv6 not functioning |
| | | |correctly as of the |
| | | |improved NFS support for |
| | | |disconnection changes. |
|NFS over IPv6 |In progress|Doug White |Doug White has tracked |
|problems | | |down the source of the |
| | | |problem (EMSGSIZE being |
| | | |returned by IPv6 UDP send|
| | | |routine due to |
| | | |fragmentation), and is |
| | | |currently exploring |
| | | |possible fixes. |
|--------------------+-----------+-------------+-------------------------|
| | | |There are reports of |
| | | |applications wedging in |
| | | |poll() and select() while|
| | | |running the network stack|
| | | |without the Giant lock. A|
| | | |recent sleepq change |
| | | |appears to have caused |
| | | |some of the observed |
| | | |problems to go away |
|poll()/select() | | |(others are difficult to |
|application wedge |In progress|Robert Watson|test for due to recent |
|reports with | | |SMP instability). A fix |
|debug.mpsafenet=1 | | |has been committed to CVS|
| | | |HEAD and merged to |
| | | |RELENG_5 and appears to |
| | | |resolve problems with |
| | | |poll(); we are waiting |
| | | |for feedback that it has |
| | | |corrected the reported |
| | | |problems with select() |
| | | |also before moving this |
| | | |to "testing" status. |
|--------------------+-----------+-------------+-------------------------|
| | | |ether_input() calls |
| | | |random_harvest() on the |
| | | |mbuf after it has been |
| | | |handed off to |
|ether_input() may | |Mark Murray, |ether_demux(), at which |
|harvest entropy from|In progress|Robert Watson|point it may have been |
|free()'d mbuf | | |free()'d back to the mbuf|
| | | |allocator. It also passes|
| | | |in a pointer to the mbuf |
| | | |itself, rather than |
| | | |ethernet frame header. |
|--------------------+-----------+-------------+-------------------------|
| | | |Kris Kennaway has |
| | | |reported problems with |
| | | |boot time panic's, mutex |
|boot time panic |Not done |- |Giant not owned at |
| | | |kern/vfs_subr.c:1365. See|
| | | |"Re: 5.3-RELEASE TODO" |
| | | |thread in -current at . |
|--------------------+-----------+-------------+-------------------------|
| | | |The ifconf() ioctl for |
| | | |listing network |
| | | |interfaces performs a |
| | | |copyout() while holding |
|ifconf() sleep | | |the global ifnet list |
|warning |In progress|Robert Watson|mutex. This generates a |
| | | |witness warning in the |
| | | |event that copyout() |
| | | |generates a page fault, |
| | | |and risks more serious |
| | | |problems. |
+------------------------------------------------------------------------+
Required features for 5.3-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|-----------------+-------------+----------------+-----------------------|
| BIND9 import | | | BIND9 must be |
| into 5-CURRENT | In progress | Doug Barton | imported for |
| | | | 5.3-RELEASE. |
|-----------------+-------------+----------------+-----------------------|
| | | | Kernel bits |
| KSE support for | | | implemented, userland |
| sparc64 | -- | -- | not implemented. |
| | | | Required for |
| | | | 5.3-RELEASE. |
|-----------------+-------------+----------------+-----------------------|
| | | | With improved support |
| | | | for threading |
| | | | primitives, support |
| | | | is now required to |
| GDB thread | | David Xu, | ease debugging of |
| support | In progress | Marcel | threaded |
| | | Moolenaar | applications. |
| | | | Ideally, this support |
| | | | will work for both |
| | | | libthr and libkse |
| | | | threading models. |
|-----------------+-------------+----------------+-----------------------|
| | | | There have been |
| | | | several reports that |
| | | | growfs(8) works |
| | | | improperly with large |
| Reports of UFS2 | | | disk sizes, and other |
| "large disk" | In progress | Scott Long | size-related nits in |
| problems | | | the current disk and |
| | | | label management tool |
| | | | set. These must be |
| | | | resolved for |
| | | | 5.3-RELEASE. |
|-----------------+-------------+----------------+-----------------------|
| | | | Synaptics updates to |
| | | | the psm(4) driver |
| Synaptics | | | have resulted in poor |
| touchpad | In progress | Philip Paeps | interactivity for |
| problems | | | taps and button press |
| | | | events for some |
| | | | users. |
|-----------------+-------------+----------------+-----------------------|
| | | | Entropy harvesting in |
| | | | the interrupt and |
| | | | incoming packet paths |
| | | | currently involves a |
| | | | large number of mutex |
| | | | operations. In order |
| | | | to improve |
| | | | performance, it is |
| Entropy | | | desirable to reduce |
| harvesting | In progress | Robert Watson, | the number of mutex |
| optimizations | | Mark Murray | operations |
| | | | substantially. Work |
| | | | is in progress to |
| | | | improve the |
| | | | harvesting code along |
| | | | these lines, but has |
| | | | not yet been properly |
| | | | measured, and |
| | | | therefore not yet |
| | | | merged to CVS. |
+------------------------------------------------------------------------+
Desired features for 5.3-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|------------------+-------------+----------------+----------------------|
| | | | Almost all process |
| | | | debugging tools have |
| | | | been updated to use |
| | | | non-procfs kernel |
| | | | primitives, with the |
| | | | exception of |
| | | | truss(1). As procfs |
| | | | is considered |
| | | | deprecated due to |
| | | | its inherent |
| | | | security risks, it |
| truss support | | | is highly desirable |
| for ptrace | -- | -- | to update truss to |
| | | | operate in a |
| | | | post-procfs world. |
| | | | Dag-Erling Smorgrav |
| | | | had prototype |
| | | | patches; |
| | | | Robert Drehmel is |
| | | | developing and |
| | | | testing patches now. |
| | | | Support for system |
| | | | call tracing has |
| | | | been added to |
| | | | ptrace(). |
|------------------+-------------+----------------+----------------------|
| | | | FAST_IPSEC currently |
| | | | cannot be used |
| | | | directly with the |
| | | | KAME IPv6 |
| | | | implementation, |
| | | | requiring an |
| | | | additional level of |
| | | | IP tunnel |
| | | | indirection to |
| | | | protect IPv6 packets |
| FAST_IPSEC and | | | when using hardware |
| KAME | Not done | -- | crypto acceleration. |
| compatibility | | | This issue must be |
| | | | resolved so that the |
| | | | two services may |
| | | | more easily be used |
| | | | together. Among |
| | | | other things, this |
| | | | will require a |
| | | | careful review of |
| | | | the handling of mbuf |
| | | | header copying and |
| | | | m_tag support in the |
| | | | KAME IPv6 code. |
|------------------+-------------+----------------+----------------------|
| | | | A process cannot be |
| | | | interrupted while |
| | | | waiting on a lock. |
| rpc.lockd(8) | | | Fixing this requires |
| stability | -- | -- | that the RPC code be |
| | | | taught how to deal |
| | | | with lock |
| | | | cancellation and |
| | | | interruption events. |
|------------------+-------------+----------------+----------------------|
| | | | Kernel modules are |
| | | | currently built |
| | | | independently from a |
| | | | kernel |
| | | | configuration, and |
| | | | independently from |
| | | | one another, |
| | | | resulting in |
| | | | substantially |
| | | | redundant |
| | | | compilation of |
| | | | objects, as well as |
| | | | the inability to |
| | | | easily manage |
| | | | compile-time options |
| Revised kld | | | for kernel objects |
| build | Not done | Peter Wemm | (such as MAC, PAE, |
| infrastructure | | | etc) that may |
| | | | require conditional |
| | | | compilation in the |
| | | | kernel modules. In |
| | | | order to improve |
| | | | build performance |
| | | | and better support |
| | | | options of this |
| | | | sort, the KLD build |
| | | | infrastructure needs |
| | | | to be revamped. |
| | | | Peter Wemm has done |
| | | | some initial |
| | | | prototyping, and |
| | | | should be contacted |
| | | | before starting on |
| | | | this work. |
|------------------+-------------+----------------+----------------------|
| | | | Apple's Darwin |
| | | | operating system has |
| | | | fairly extensive |
| Merge of Darwin | | | improvements to |
| msdosfs, other | Not done | -- | msdosfs and other |
| fixes | | | kernel services; |
| | | | these fixes must be |
| | | | reviewed and merged |
| | | | to the FreeBSD tree. |
|------------------+-------------+----------------+----------------------|
| | | | Truss appears to |
| | | | contain a race |
| | | | condition during the |
| | | | start-up of |
| | | | debugging, which can |
| | | | result in truss |
| | | | failing to attach to |
| | | | the process before |
| | | | it exits. The |
| | | | symptom is that |
| | | | truss reports that |
| | | | it cannot open the |
| | | | procfs node |
| | | | supporting the |
| | | | process being |
| | | | debugged. A bug also |
| Race conditions | Errata | Robert Drehmel | appears to exist |
| in truss | candidate | | where in truss will |
| | | | hang if execve() |
| | | | returns ENOENT. A |
| | | | further race appears |
| | | | to exist in which |
| | | | truss will return |
| | | | "PIOCWAIT: |
| | | | Input/output error" |
| | | | occasionally on |
| | | | startup. The fix for |
| | | | this sufficiently |
| | | | changes process |
| | | | execution handling |
| | | | that we will defer |
| | | | the fix to post-5.0 |
| | | | and consider this |
| | | | errata. |
|------------------+-------------+----------------+----------------------|
| | | | Truss appears to |
| | | | have another |
| | | | problem. It is |
| | | | repeatable by |
| | | | running "truss -f |
| More truss | Not done | -- | fsck -p /", |
| problems | | | suspending it with |
| | | | ^Z, and then killing |
| | | | truss. It will leave |
| | | | behind the fsck |
| | | | processes which will |
| | | | be unkillable. |
|------------------+-------------+----------------+----------------------|
| | | | Many systems |
| | | | supporting POSIX.1e |
| | | | ACLs permit a minor |
| | | | violation to that |
| | | | specification, in |
| | | | which the ACL_MASK |
| ACL_MASK | | | entry overrides the |
| override of | Not done | Robert Watson | umask, rather than |
| umask support in | | | being intersected |
| UFS | | | with it. The |
| | | | resulting semantics |
| | | | can be useful in |
| | | | group-oriented |
| | | | environments, and as |
| | | | such would be very |
| | | | helpful on FreeBSD. |
|------------------+-------------+----------------+----------------------|
| | | | The LOR reported in |
| | | | PR kern/55175 needs |
| filedesc LOR | Not done | -- | to be fixed. |
| | | | Filedesc locking |
| | | | needs to be heavily |
| | | | reviewed in general. |
|------------------+-------------+----------------+----------------------|
| | | | Currently, MAC |
| | | | protections are |
| | | | enforced only on |
| | | | locally originated |
| | | | file system |
| | | | operations (VOPs), |
| | | | and not on RPCs |
| | | | generated via the |
| | | | NFS server. |
| MAC support for | | | Improvements in NFS |
| NFS Server | Not done | Robert Watson | server credential |
| | | | handling are |
| | | | required to correct |
| | | | this problem, as |
| | | | well as the |
| | | | introduction of new |
| | | | entry points to |
| | | | properly label NFS |
| | | | credentials and |
| | | | perform enforcement |
| | | | properly. |
|------------------+-------------+----------------+----------------------|
| | | | All PCI drivers must |
| | | | use busdma for DMA; |
| | | | no use of vtophys() |
| busdma in all | In progress | -- | will be permitted |
| PCI drivers | | | for any recent |
| | | | device driver. ISA |
| | | | drivers may be |
| | | | exempt. |
|------------------+-------------+----------------+----------------------|
| | | | Userland bits |
| KSE support for | In progress | Marcel | implemented, kernel |
| alpha | | Moolenaar | bits not |
| | | | implemented. |
|------------------+-------------+----------------+----------------------|
| | | | For kernel API/ABI |
| | | | compatibility |
| | | | reasons, it would be |
| CAM locking | In progress | Scott Long, | desirable to have |
| | | Justin Gibbs | the CAM locking |
| | | | strategy determined |
| | | | and loosely |
| | | | implemented for 5.3. |
|------------------+-------------+----------------+----------------------|
| | | | When running syscons |
| | | | on an Ultra-30 with |
| | | | Creator-3D typing |
| | | | characters on the |
| | | | keyboard produces |
| | | | garbage. Problem |
| | | | reported by Kris |
| syscons not | | | Kennaway. Debugging |
| working on | Not done | -- | difficult due to |
| Sparc64 Ultra-30 | | | lack of this |
| | | | particular |
| | | | configuration among |
| | | | developers and |
| | | | problem isn't |
| | | | present on similar |
| | | | hardware (e.g. no |
| | | | problem on Ultra-60 |
| | | | w/Creator-3D). |
+------------------------------------------------------------------------+
Documentation items that must be resolved for 5.3
+-------------------------------------------------------------------------------+
| Issue | Status |Responsible| Description |
|--------------+-----------+-----------+----------------------------------------|
| | | |The installation documentation doesn't |
|i386 Floppy | |Gavin |take into account the new floppy images |
|Installation |Done |Atkinson, |(with a full kernel split across |
|Docs | |Bruce A. |multiple disks). This should be updated.|
| | |Mah |References: |
| | | |docs/70485 (closed) |
|--------------+-----------+-----------+----------------------------------------|
|Finish | |Simon L. |Finish removing mention of individual |
|hardware notes|In progress|Nielsen, |devices in the hardware notes and use |
|trimming | |Christian |auto-generated lists, based on driver |
| | |Brueffer |manual pages, instead. |
|--------------+-----------+-----------+----------------------------------------|
| | | |The snd(4) and pcm(4) drivers have been |
| | | |renamed but their manual pages are still|
| | | |outdated. sound(4) has to be added and |
| | | |pcm(4), csa(4), gusc(4), sbc(4), and |
| | | |uaudio(4) should be revised. Other |
|sound(4) | | |manual pages which refer to pcm(4) (if |
|related manual|In progress|Simon L. |any) should possibly be revised, too. In|
|pages | |Nielsen |addition, supported cards list needs to |
| | | |be updated. |
| | | |References: |
| | | |Manpage for snd_solo on -doc@ |
| | | |[PATCH] sound(4) related manpages 5.3 |
| | | |TODO item on -doc@ |
| | | |src/share/man/man4/Makefile rev.1.279 |
|--------------+-----------+-----------+----------------------------------------|
|Sound section | | |This section is outdated, some rewrites |
|in the |In progress|Marc |are needed for 5.3-RELEASE. |
|Handbook | |Fonvieille |References: |
| | | |Draft for review |
|--------------+-----------+-----------+----------------------------------------|
|FDP | | |With the snd(4) and pcm(4) drivers |
|documentations|Not done |-- |changes, documentations (FAQ) regarding |
|related pcm(4)| | |the use of these drivers need an update.|
|--------------+-----------+-----------+----------------------------------------|
| | | |Xin LI pointed out that FreeBSD |
| | | |5.3-RELEASE is the first stable release |
| | | |on 5.X and it is (hopefully) not for |
| | | |early adopters. Early Adopter's Guide is|
| | | |still useful, but contains a bit old |
|Early | |Bruce A. |information. Some parts of this guide |
|Adopter's |In progress|Mah, Tom |need a rewrite, and this document should|
|Guide | |Rhodes |be published as "4.X to 5.X Migration |
| | | |Guide", which focuses difference between|
| | | |4.X and 5.X. |
| | | |References: |
| | | |Draft for review |
| | | |discussion on -doc@ and -current@ |
|--------------+-----------+-----------+----------------------------------------|
| | | |Some parts are outdated. doc/70485 has |
| | | |been committed, but more work is needed |
| | | |to reflect the realities. bmah@ pointed |
| | | |out that we should have "quick-start" |
|Installation |Not done |Tom Rhodes |installation guide for each platform |
|Notes | | |instead of the current ones because they|
| | | |become too long and difficult to be |
| | | |maintained. |
| | | |References: |
| | | |doc/70485 (closed) |
|--------------+-----------+-----------+----------------------------------------|
| | | |Update the X11 chapter of the Handbook |
| | |Ken Tom, |for X.Org's X11 server. |
|Xorg |Done |Marc |References: |
| | |Fonvieille |books/handbook/config/chapter.sgml |
| | | |rev.1.147 |
|--------------+-----------+-----------+----------------------------------------|
| | | |Ch.11.4 and 11.5 of the Handbook must be|
| | | |updated to mention the new rc.d scripts |
| | | |and some ports use /etc/rc.conf for |
| | | |their configuration. |
|rc.d scripts |In progress|Tom Rhodes |References: |
| | | |books/handbook/config/chapter.sgml |
| | | |rev.1.170 |
| | | |books/handbook/config/chapter.sgml |
| | | |rev.1.172 |
|--------------+-----------+-----------+----------------------------------------|
| | | |Chapter 8 must be updated to match |
|Handbook's | | |5.3-RELEASE. |
|kernel |Done |Ceri Davies|References: |
|configuration | | |docs/70674 (closed) |
|chapter | | |books/handbook/kernelconfig/chapter.sgml|
| | | |rev.1.135 |
|--------------+-----------+-----------+----------------------------------------|
| | | |Some parts of Section 14.10 are outdated|
|Handbook's | | |and are not correct for 5.X systems. |
|IPsec section |Not done |-- |References: |
| | | |ipsec on -doc@ |
| | | |Problem with IPSEC in handbook on -doc@ |
|--------------+-----------+-----------+----------------------------------------|
|Handbook's |Not done |-- |Vinum chapter needs to be revised for |
|Vinum chapter | | |5.X systems. |
+-------------------------------------------------------------------------------+
Testing focuses for 5.3-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|-------------------+---------------+--------------+---------------------|
| | | | SCHED_ULE provides |
| | | | better |
| | | | interactivity, |
| | | | higher performance, |
| SCHED_ULE as the | Needs testing | Jeff | and the ability to |
| default scheduler | | Roberson | support pinning and |
| | | | affinity. Basic HTT |
| | | | scheduling policies |
| | | | should be in place |
| | | | for 5.3 also. |
|-------------------+---------------+--------------+---------------------|
| | | | KSE has matured to |
| | | | the point of being |
| | | | more stable and |
| | | | POSIX-compliant |
| | | | than the |
| | | | traditional libc_r. |
| | | | All Tier-1 |
| | | | platforms MUST have |
| KSE as the | | David Xu, | stable KSE support |
| default threads | Needs testing | Daniel | for 5.3 in order to |
| library | | Eischen | support a |
| | | | consistent |
| | | | transition. |
| | | | Additionally, all |
| | | | ports that depend |
| | | | on the pthreads API |
| | | | must be modified to |
| | | | properly detect and |
| | | | support the default |
| | | | threading library. |
|-------------------+---------------+--------------+---------------------|
| | | | Binutils needs |
| | | | updating in order |
| Updated binutils | | David | to support new |
| for all platforms | Needs testing | O'Brien | platforms, newer |
| | | | GDB versions, and |
| | | | Thread Local |
| | | | Storage. |
|-------------------+---------------+--------------+---------------------|
| | | | The previous GCC |
| | | | 3.3 snapshot |
| | | | included |
| | | | regressions in |
| | | | alignment of |
| | | | floating point |
| gcc 3.3 floating | | | arguments, |
| point alignment | Needs testing | | resulting in a |
| regression | | | substantial |
| | | | performance |
| | | | degradation. The |
| | | | recent GCC 3.4.2 |
| | | | import should fix |
| | | | this, but more |
| | | | testing is needed. |
|-------------------+---------------+--------------+---------------------|
| | | | Jun Kuriyama has |
| | | | reportged a failed |
| | | | locking assertion |
| | | | with IPv6 TCP |
| in6_pcbnotify() | Needs testing | Robert | notifications. A |
| panic with TCP | | Watson | patch has been |
| | | | committed to the |
| | | | CVS HEAD and |
| | | | RELENG_5 and needs |
| | | | further testing. |
|-------------------+---------------+--------------+---------------------|
| | | | To complete support |
| | | | for thread-local |
| | | | storage on FreeBSD, |
| | | | per-architecture |
| Per-platform | | Doug Rabson, | changes must be |
| Thread-Local | Needs testing | Marcel | made. Currently |
| Storage | | Moolenaar | pending platforms |
| | | | are amd64, alpha, |
| | | | ia64, i386, |
| | | | sparc64, and |
| | | | powerpc. |
|-------------------+---------------+--------------+---------------------|
| | | | High load on SMP |
| | | | systems appears to |
| | | | result in a hard |
| | | | hang related to VM |
| | | | IPI. Doug White has |
| SMP instability | | Doug White, | prepared a |
| under load | Needs testing | Alan L. Cox | candidate patch |
| | | | that appears to |
| | | | resolve this |
| | | | instability, which |
| | | | is currently in |
| | | | testing for merge |
| | | | to the CVS HEAD. |
|-------------------+---------------+--------------+---------------------|
| | | | Significant parts |
| | | | of the network |
| | | | stack (especially |
| | | | IPv4, UNIX domain |
| | | | IPC, and sockets) |
| | | | now have |
| | | | fine-grained |
| | | | locking of their |
| | | | data structures. |
| | | | It's possible to |
| | | | run many common |
| | | | network subsystems |
| | | | and services |
| | | | without the Giant |
| Fine-grained | | | lock. However, a |
| network stack | Needs testing | Robert | number of device |
| locking without | | Watson | drivers and less |
| Giant | | | mainstream network |
| | | | subsystems are |
| | | | currently not |
| | | | MPSAFE. By |
| | | | 5.3-RELEASE, it is |
| | | | necessary to have |
| | | | the vast majority |
| | | | of network code |
| | | | running without |
| | | | Giant, including |
| | | | sockets, permitting |
| | | | complete |
| | | | local<->remote |
| | | | delivery without |
| | | | grabbing Giant. |
|-------------------+---------------+--------------+---------------------|
| | | | As part of the |
| | | | MPSAFE network |
| | | | stack work, |
| | | | delivery of routing |
| | | | socket messages was |
| | | | moved to queued |
| | | | dispatch via netisr |
| | | | rather than direct |
| | | | dispatch from the |
| | | | routing code. |
| Increased and | | | However, the risks |
| configurable | | Robert | of lost routing |
| netisr queue max | Needs testing | Watson | messages for |
| depth for routing | | | routing daemons are |
| sockets | | | high; respond by |
| | | | increasing the max |
| | | | depth beyond a |
| | | | default interface |
| | | | max depth of 50 to |
| | | | 128, and allow it |
| | | | to be |
| | | | user-configured. |
| | | | This change is now |
| | | | present in CVS HEAD |
| | | | and RELENG_5. |
|-------------------+---------------+--------------+---------------------|
| | | | KLDs work when |
| | | | loaded from |
| | | | userland, but not |
| | | David | from the loader. |
| kld support for | Needs testing | O'Brien, Ian | kldxref and loader |
| amd64 | | Dowse | support has been |
| | | | committed to HEAD |
| | | | and RELENG_5 and |
| | | | needs final |
| | | | testing. |
|-------------------+---------------+--------------+---------------------|
| | | | Recent changes to |
| | | | the ATA driver |
| | | | trigger a bug on |
| ATA panics under | | So/ren | sparc64 that causes |
| sparc64 | Needs testing | Schmidt, | a panic on boot. |
| | | Scott Long | This was caused by |
| | | | bugs in busdma that |
| | | | have been hopefully |
| | | | fixed. |
+------------------------------------------------------------------------+
----------------------------------------------------------------------
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Last modified: 2004/09/16 20:28:05